<?xml version="1.0" encoding="utf-8"?>
<preface xmlns:db="http://docbook.org/docbook-ng"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
         xml:id="preface">
  <?dbhtml filename="preface.html"?>
  <title>Preface</title>
  
  <xi:include href="about.xml"/>
  <xi:include href="introduction.xml"/>
</preface>
